Not working... strange symbols

[mcferdev]

I tried to use, but after scan, the result is very strange. A lot of "trashs" ...
And are very slow. I tooked a picture from a world "HELLO" and i had to wait 10 sec to give the result with a lot of trash.
Something wrong with it.

[marcuslee15]

Experiencing same as marcelinhovt.
Is there any way to resolve?